<template>
	<div id="app">
		<ul>
			<li v-for="item in myArr" :key="item">{{ item }}</li>
		</ul>
		<button @click="btn">走一走</button>
	</div>
</template>

<script>
export default {
	data() {
		return {
			myArr: ["帅哥", "美女", "程序猿"],
		};
	},
	methods: {
		btn() {
			// 头部数据加入到末尾
			this.myArr.push(this.myArr[0]);
			// 再把头部的数据删除掉
			this.myArr.shift();
		},
	},
};
</script>

<style>
</style>
